Mary learned Chinese for about two years, _______is, from 1993 to 1995.
| A．this | B．that | C．it | D．he |
A number of people suffer ill effects from drugs ______ they take the drug exactly as directed.
| A．even though | B．as if | C．in case | D．in that |
The silence of the library is sometimes broken by a sudden cough or the sound of pages _____.
| A．turning | B．turned | C．being turned | D．having turned |
It is said that _____ good companion is better than _____ fortune, which can’t buy true qualities.
| A．/; the | B．the; a | C．the; the | D．a; a |
--- Shall I give you a hand as your case is so heavy?
----Thank you._____.
| A．Of course you can | B．It’s up to you. |
| C．If you can | D．It couldn’t be better. |
___he hasn’t come is_______ he is busy writing his novel.
| A．Why, because; | B． Why, for; | C．That, because; | D．What, for |