You can hardly imagine the difficulty the woman had _____ her children.
| A．taking up | B．turning up | C．bringing up | D．pulling up |
Some of you may have finished unit one. _____ , you can go on to unit two. 
| A．If you may | B．If you do | C．If not | D．If so |
The government plans to bring in new laws _____ parents to take more responsibility for the education of their children.
| A．forced | B．forcing | C．to be forced | D．having forced |
The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |
Frank put the mediocre in the top drawer to make sure it would not be_______ to the kids.
| A．accessible | B．relative | C．acceptable | D．sensitive |
---Do you want a lift home? 
---It’s very kind of you, but I have a much late in the office. I overslept this morning because my morning clock _______.
| A．doesn’t go off | B．won’t gone | C．wasn’t going off | D．didn’t go on |