After careful research, it was decided that the spaceship should reenter the Earth’s________.
| A．surface | B．air | C．environment | D．atmosphere |
I think it must be the bridge _______that has caused the traffic jam.
| A．repaired |
| B．to be repaired |
| C．being repaired |
| D．repairing |
Though _______ money, his parents managed to send him to university.
| A．lacked |
| B．lacking of |
| C．lacking |
| D．lacked in |
_______a little longer in the morning, Bob turned off the alarm.
| A．To sleep |
| B．Sleeping |
| C．Slept |
| D．Having slept |
Looking around on the crowded bus,he caught a man _______ his hand into the pocket of an old man.
| A．put |
| B．to be putting |
| C．to put |
| D．putting |
_______ in the fields on a March afternoon, he could feel the warmth of spring.
| A．To walk |
| B．Walking |
| C．Walked |
| D．Having walked |