He observed a stranger __________ around the store at midnight.
A, wandering B. to wander
C. wander D. to be wandering
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 |
The report says ________ number of endangered animals is increasing，for ________ number of them are being hunted or having no food to eat.
| A．the；a |
| B．the；the |
| C．a；a |
| D．a；the |