单项选择题
The research laboratory is going to ______ the new type...
单项选择题The research laboratory is going to ______ the new type of computer to use.
—Look! He's running so fast! —Hard to ______ his legs w...
单项选择题—Look! He's running so fast! —Hard to ______ his legs were once broken.
Have a cigarette, ______A．will youB．don't youC．do youD．...
单项选择题Have a cigarette, ______
