To my great joy．I got a chance to take a photo with Andy after the vocal concert, which I _____forward to for years．
A．have been looking B．had been looking
C．looked D．had looked
Li Ming, don't forget to turn off the lights before you leave the office, _____?
A．won't you B．should he C．shall we D．will you
_____ is well known to the world is that China has very top technology in space industry．
A．It B．As C．What D．Which
With two children _____ high school, the farmer couple have to work from morning till night．
A．attended B．being attended C．attend D．attending
—You seem to have had a wonderful winter holiday!
—Yes．Really warm days during the Spring Festival．My parents and I _____ to several tourist spots．
A．are driving B．drove
C．have been driving D．will drive
Many people think any government's work should be evaluated ______ on citizens' happiness level．
A．based B．to be based C．basing D．being based
