与AT有关的介词短语及时态填空

以介词为中心的介词短语。

如：at
at six o′clock, at present, at noon,
at night, at sunrise(sunset), at Christmas,
at breakfast, at supper, at a bus stop,
at a book-shop, at the foot of, at the bottom of, at the street corner, at the same time, at the top of one′s voice, at first, at last, at the beginning of, at the end of, at (the ) most, at least,
at the sight of, at the sound of, at the smell of, at the taste of, at the mention of, at the thought of, at the news of, at the age of, at the edge of,
at(a)／the speed of, at top speed, at different speeds, at half speed, at an ordinary speed, at an added speed, at full speed, at high speed (Notice: with all／great speed), at high price, at the price of;
be surprised at, be pleased at (hearing, seeing…), be at war (peace), be at table(desk),
be at work, be good (bad)at;
shoot at, look at, glare at,
stare at, aim at, fire at,
laugh at, sneer at, shout at,
throw at, come a t, work at,
thrust at , gaze at,
用所给动词的正确时态填空
Sam and Joe were astronauts. There 1 (be) once a very dangerous trip and the more experienced astronauts knew there was only a small chance of coming back alive （活着）. Sam and Joe,however，thought it would 2 (be) exciting though a little dangerous. “We 3 (be) the best men for the job，”they said to the boss. “There may 4 (be) problems，but we can find the answers.”“They're the last people I'd trust，thought the boss.“But all the other astronauts have refused to go.”
Once they 5 (be) in space，Joe had to go outside to make some repairs. When the repairs were done, he 6 (try) to get back inside the spaceship. But the door was locked. He knocked but there 7 (be) no answer. He knocked again，louder this time，and again no answer came. Then he 8 (hit) the door as hard as he could and finally a voice said，“Who's there?”“It's me! Who else could it be?”9 (shout) Joe. Sam let him in all right but you can imagine that Joe never 10 (ask) to go on a trip with Sam again!。