A. boys students; theB. boy students; theC. boy student……

单项选择题So far we have done a lot to build a low-carbon economy, but it is （）ideal. We have to work still harder．

A．next to
B．far from
C．out of
D．due to

单项选择题David is good （）English，but he doesn't do well （）PE．

A. at; on
B. at; in
C. at; with
D. in; at

单项选择题— Peter, where did you guys go for the summer vacation— We （）working for months，so we went to the beach to relax ourselves．

A．were
B．have been
C．had been
D．will be

单项选择题Thousands of foreigners were （）to the Shanghai World Expo the day it opened．

A．attended
B．attained
C．attracted
D．attached

单项选择题— I haven't got the reference book yet．but I'll have a test on the subject next month．— Don't worry．You （）have it by Friday．

A．could
B．shall
C．must
D．may