It’s reported that in the past 50 years around 80 percent of Beijing’s courtyard houses ______.
| A．had wiped out | B．have wiped out |
| C．have been wiped out | D．had been wiped out |
Children will work actively if_________________.
| A．praise | B．praised | C．praising | D．to praise |
He told us an interesting story about himself, _______________why he didn’t succeed that time.
| A．explain | B．to explain | C．explained | D．explaining |
Don’tplaywiththedog,Jack,forit_____________bedangerousattimes.
| A．shall | B．should | C．can | D．Must |
I_____in London for many years, but I’ve never regretted my final decision to move back to China.
| A．lived | B．was living | C．have lived | D．had lived |
Nowadaystherolesofhusbandandwifearenotas__________definedasbefore,especiallywhenbothpartnersworkandearnmoneyforthefamily.
| A．clear | B．clearer | C．clearly | D．moreclearly |