—Why did you leave without a word of warning to John?
—But what _____ otherwise? He never listens to me.
| A．could I have done | B．would I do |
| C．must I have done | D．should I do |
.
You may fly to South Korea next Friday, ______ you don’t mind changing planes on the way.
| A．as far as | B．provided | C．unless | D．supposing |
.
As reported in the essay by Prof. Brown, it is only in the most difficult circumstances ________ a man’s abilities are fully tested.
| A．when | B．where | C．that | D．as |
.
______ the traffic jam we should have arrived at the airport half an hour earlier.
| A．In spite of | B．Except for | C．As a result of | D．But for |
.
_______ US newspaper reported, that from next autumn, ________ new computer system will follow the progress of international students at their schools in the USA.
A. 不填; a B. The; the C. A; aD. A; 不填
.
_____ price decline ______ farmers' income, the central government has decided to buy more crops to protect farmers.
| A．Preventing; to affect | B．To prevent; affecting |
C．Having prevented; affecting | D．To prevent; being affected |