At first the experiment went on well, but ______ problems we hadn’t expected turned up later and it failed.
| A．outstanding |
| B．curious |
| C．powerful |
| D．various |
The ambulance was just arriving, for a worker, who ______ the window on the second floor, fell off the window.
| A．had been repairing | B．was repairing |
| C．has been repairing | D．would be repairing |
He witnessed Yushu, a county in Qinghai Province hit by _____ unexpected earthquake, but the Yushu people haven’t lost heart, vowing to turn their homeland into _____ more beautiful Yushu.
| A．a; a | B．an; the |
| C．the; a | D．an; a |
A traffic regulation released in a foreign country states that passengers sharing a car with a drunken driver _____ be punished together with the driver himself.
| A．can | B．must |
| C．shall | D．will |
---- Why is the cake so expensive?
---- Maybe you don’t know a cake made of wheat costs less than _____ made of rice.
| A．one | B．that |
| C．the one | D．another |
---- Do you think it's a good idea to make friends with your students?
---- _____ , I do．I think it's a great idea．
| A．Really | B．Obviously | C．Actually | D．Generally |