Great changes _________ in Nanjing since the1990s.
| A．took place | B．were taken place |
| C．have taken place | D．have been taken place |
—Lucy,do you go to the park?
—Three times a week.
| A．How far | B．How long | C．How often | D．How much |
---How do you usually go to school?
----________
| A．By a bus. | B．On foot. | C．On bike. | D．with car |
I’ll give you a call if he _____ tonight.
| A．came | B．will come | C．comes | D．is coming |
He was so busy ____ his homework that he forgot to have supper.
| A．to do | B．do | C．doing | D．does |
Going _____ the crowd of people isn’t an easy thing.
| A．across | B．cross | C．through | D．over |