___he hasn’t come is_______ he is busy writing his novel.
| A．Why, because; | B． Why, for; | C．That, because; | D．What, for |
It’s heavy, but I can ________ to carry it upstairs.
| A．try | B．attempt | C．succeed | D．manage |
---- It is a long time since I saw my sister.
----________ her this weekend?
Why not to visit B. Why not visit
C. Why not visiting D. Why don’t visit
What _______ the foreign experts most is that the new factory is perfectly environment-friendly.
| A．terrifies | B．reminds | C．forgives | D．impresses |
Can you make sure_______ the gold ring?
| A．where Alice had put | B．where had Alice put |
| C．where Alice has put | D．where has Alice put |
In order to increase the______ of the farm______, our government offers a lot of money to the peasants every year.
| A．products; produce | B．produce; production |
| C．production; produce | D．production; products |