A pilot noticed a balloon which seemed to be making for a Royal Air Force Station nearby. He informed the station at once, but no one there was able to explain the mystery. The officer in the control tower was very angry when he heard the news, because balloons can be a great danger to aircraft. He said that someone might be spying on the station and the pilot was ordered to keep track of the strange object. The pilot managed to circle the balloon for some time. He could make out three men in a basket under it and one of them was holding a pair of binoculars. When the balloon was over the station, the pilot saw one of the men taking photographs. Soon afterwards, the balloon began to descend and it landed near an airfield. The police were called in, but they could not arrest anyone, for the basket contained two Members of Parliament and the Commanding Officer of the station! As the Commanding Officer explained later, one half of the station did not know what the other half was doing!
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1．A pilot noticed a balloon which seemed to be making for a Royal Air Force Station nearby. 一个飞行员发现了一只气球，它像是正飞往附近的一个皇家空军基地。
（1）to be making for为不定式的进行式，表示正在进行的动作：
They seem to be talking about something important.
She seems to be looking for somebody/something.
While the thief was making for his car, a policeman stopped him.
After leaving Calais, the ship made for Dover.
2．He said that someone might be spying on the station and the pilot was ordered to keep track of the strange object. 他说有可能有人正对基地进行侦察，因此命令那个飞行员跟踪那个奇怪的飞行物。
（1）might be doing sth．表示对正在进行的动作的推测（cf．第19课语法）：
（2）keep track of 为固定短语，表示“追踪”、“保持联系”、“记录”等（其反义词为 lose track of）：
Keep track of the man wearing a grey hat. He looks suspicious to me.
She managed to keep track of her friends.
3．He could make out three men in a basket under it…
In the darkness of night, he could just make out three men coming toward them.
Can you make out what they are talking about?
I can't make out the boss's handwriting.
4．The police were called in…
call in 在这里表示“召来”：
Sam has a temperature. We'd better call in a doctor.
When he discovered that some important things were missing in his room, he called the police in.
balloon n. 气球
royal adj. 皇家
spy v. 侦察
track n. 轨迹，踪迹
binoculars n. 望远镱
Someone is spying on the station.
I noticed some policemen spying on the foreign tourists.
He spied a stranger in his garden.
She spied a cloud of smoke in the distance.
He was once a spy for the police / British government.
They have arrested three spies.
2．动词 make 的一些固定短语
make 可以与许多介词或副词连用，产生新的含义。课文中出现了 make for和 make out。较常用的还有 make up与 make up for等。
（1）make out 除了表示“辨出”、“听出”的含义外，还可以表示“理解”、“弄清”：
I can't make out what this picture is about.
Can you make out what the child wants?
Jane is angry again. Sometimes I can't make her out at all. Her moods change quickly.
make out 的另一个含义是“写出”、“填写”（相当于 write out）：
He made out a long list of all the foods which were forbidden.
He made out a cheque of 1, 000 dollars and gave it to the secretary.
（2）make up 的含义之一是“编造”、“捏造”、“虚构”：
Every time he played truant, Tom would make up an excuse.
Jane made up a story about a child and a monster.
make up 也可以表示“（给……）化妆／化装”：
She always makes herself up / makes up her face before going out.
Making up takes up a lot of her time.
She was made up as a boy.
（3）make up for 的含义是“补偿”、“弥补”：
I had to walk faster to make up for lost time.
She managed to make up for her mistake.
A was able to explain (1.3); can be a great danger (1.5);managed to circle (1.7); could make out (1.8); could not arrest (1.11)
C 1 Can / Could 2 could / was (soon) able to 3 were able to 4 can
1 out 2 out 3 for 4 up 5 up for
1 d 2b 3c 4b 5c 6d
7b 8b 9c 10 b 11c 12b