--- How much do you know about the 3D film technology?
--- A little. Not until ________ the hot movie Avatar ________ some about it.
| A．did I see; did I begin to learn | B．I saw; I began to learn |
| C．I saw; did I begin to learn | D．did I see; I began to learn |
Joan saw her boyfriend off at the railway station. She waved until the train was _____.
| A．in sight | B．out of sight | C．at first sight | D．lost sight |
The more often one takes exercise, ______ he or she will become.
| A．the strong | B．the stronger | C．more strong | D．more stronger |
—Do you think it’s going to rain over the weekend?
—________.
| A．I don’t believe | B．I don’t believe it | C．I believe not so | D．I believe not |
-----Why didn’t you go to the gathering yesterday?
------It rained so hard and in addition, I ________ an important essay the whole morning.
| A．wrote | B．had written | C．was writing | D．have been writing |
--- Tom, wait a minute.
--- What for?
--- Take an umbrella _____ it rains.
| A．in order that | B．so that | C．in case | D．as if |