—Why are your eyes so red? You __________ have slept well last night.
—Yeah, I stayed up late writing a report.
| A．can't | B．mustn't |
| C．needn't | D．won't |
She________Japanese when she was in Japan.Now she can speak it freely.
| A．picked out |
| B．made out |
| C．made up |
| D．picked up |
Care should be taken at all times to________the instrument from dust and damp.
| A．separate |
| B．protest |
| C．divide |
| D．protect |
It’s often less expensive to buy goods in ________quantity，but you’d better examine ________ quality before buying them.
| A．/；the |
| B．the；/ |
| C．a；the |
| D．the；the |
I thought I was going to fail the exam，but I succeeded ________.
| A．after all |
| B．first of all |
| C．in all |
| D．at all |
Chances are high ________ China and Russia will make an agreement to build an oil pipeline.
| A．when |
| B．where |
| C．that |
| D．which |