Shelly had prepared carefully for her English examination so that she could be sure of passing it on her first .
| A．intention | B．attempt | C．purpose | D．desire |
I am wondering ___________ that comes first in the final exam.
| A．who is it | B．who it is |
| C．it is who | D．which it is |
Word came ________ a new railway station would be built in our city.
| A．what | B．that | C．which | D．who |
Not until Tom read his composition the second time ________ the spelling mistake.
| A．does he notice | B．he noticed |
| C．did he notice | D．he had noticed |
Parents should encourage their kids to take part in those activities to help them______ their confidence by giving others a hand.
| A．build up | B．turn up |
| C．pick up | D．show up |
It is obvious that chemical pollution will lead to a threat to agriculture and food chain, which will ________threat human health.
| A．frequently | B．significantly |
| C．approximately | D．accordingly |