Mr. Wang would have continued to lead _____ poor life instead of changing his lifestyle if he hadn’t met Mr. Smith by _____ chance who was a businessman.
| A．the; a | B．a; the |
| C．a; / | D．/; the |
Can you explain ________ the sun goes down in the west?
| A．why is it that | B．why it is that | C．how it is that | D．how is it that |
—Someone has tidied the sitting room!
—Jim __ it this morning; he couldn't bear the mess any more．
| A．has done | B．would do | C．had done | D．did |
Peterson used to work in a remote mountain village school, which is only on foot.
| A．reliable | B．accessible | C．available | D．convenient |
I would appreciate ______ very much if you help me with my English.
| A．it | B．that | C．this | D．you |
Only by practicing a lot _____ our English well enough to communicate with foreigners.
| A．we can learn | B．can we learn | C．learn we | D．we learn |