. If you put too many potatoes in that paper-bag it will _____.
| A．blow | B．explode | C．crack | D．burst |
20 They told me it would be cheap but ________it cost me nearly 5000 yuan.
| A．as a result | B．in a word | C．at last | D．in fact |
19. What way are you thinking of ______rid of the air pollution in our capital city.
| A．to get | B．getting | C．being getting | D．being got |
18. ---- Are you free after school?
---- Sorry. I’ve planned to treat a friend of mine to dinner _______for his help.
| A．in charge | B．in honour | C．in turn | D．in return |
17. Is this research center _________ you met some foreign guests last week?
| A．that | B．where | C．which | D．in which |
16. ---- How long has this church been in service?
----_________1682, I’m afraid.
| A．After | B．In | C．From | D．Since |