―Helen________ go on the trip with us, but she isn’t quite sure yet.
| A．shall | B．may | C．must | D．can |
He always thinks of _______ he can do more for the people.
| A．what | B．how | C．if | D．whatever |
At last they climbed up the mountain，on the top of which an old temple dating back to 1,500 BC.
A. is lying B. there lies C. does lieD. 1ies
Generally speaking，prices of daily goods through the Internet are lower than store prices.
| A．bought | B． are bought | C．buying | D．to buy |
—I may go to the market this afternoon.
—Could you please buy some fruit for me you are there?
| A．since | B．if | C．while | D．fits |
Mary used to listen to music that the 0ld times.
| A．called for | B．called on | C．called up | D．called in |