_______ his return from America, he got down to his research.
| A．While | B．In | C．As | D．On |
Our English teacher hasthe English language in this text to make it easier for us to understand.
| A．changed | B．simplified |
| C．developed | D．combined |
I have to drive to the railway station tothe experts from Shanghai.
| A．take in | B．pick up |
| C．draw on | D．bring in |
Though measures have now been taken to prevent further price hikes, many people remainover the rising cost of food.
| A．concerning | B．concerns |
| C．concern | D．concerned |
The job market and the social expectations of students,
with the education system, form a big challenge for society.
| A．combine | B．to combine |
| C．combining | D．combined |
—Can I come to ask for some advice at any time?
—Yes, of course. .
| A．If you’re convenient | B．At your convenience |
| C．Don’t worry | D．Don’t mention it |