_____ 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
Growing up _____ be difficult, for you will come across many things that confuse you．
A．can B．should C．must D．shall
Lee MinHo, _____ music and films are loved by many teenagers, was invited to perform in the 2014 Spring Festival．
A．who B．whom C．whose D．which
