—We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
— I really should have gone with you, but I ________ on some remaining problems.
| A．was working | B．would work | C．worked | D．had worked |
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 |