Much time ________ sitting at a desk, office workers are generally troubled by health problems.
A.spent B.is spent C.has been spent D.having spent
- Haven’t seen you for ages. Do you still work in Shenyang?
- No, I don’t. It’s two years ________ I worked there.
A.before B.as C.when D.since
So sudden ________ that the enemy had no time to escape.
A.the attack did B.did the attack C.the attack was D.was the attack
Health problems can be _______ reduced by careful diet.
A.significantly B.suddenly C.skillfully D.sufficiently
The practice of hanging flags is a common _______ in many parts of the country on National Day.
A.sight B.scenery C.sign D.signal
This printer is of good quality. If it ________ break down within the first year, we _______ repair it at our expense.
A.shall; will B.must; should C.should; would D.can; shall
