--Tom,you didn't come to the party last night?
----I _____,but I suddenly remembered I had homework to do.
A,had to B, didn't C,was going to D, wouldn't
—He looks very happy. He ____have passed the exam,
—I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |
Nowadays, most people，in order to keep fit，prefer walking to driving ____necessary.
| A．if | B．unless | C．in case | D．as if |
Giving children pocket money as a gift during the Spring Festival is a common ____ in China.
| A．sense | B．practice | C．deed | D．habit |
_____with this challenge, he should meet it without any hesitation.
| A．Facing | B．Having faced | C．Being faced | D．Faced |
___in a heavy snow, the couple had to walk home, leaving their car behind.
| A．Caught | B．Having caught | C．Catching | D．To catch |