Beijing is one of the _______ in the world today.
| A．busiest city | B．busiest cities | C．busy city | D．busy cities |
_______ used to _______ a post office near my house.
| A．There; be | B．There; have | C．It; be | D．There; having |
She thinks the best way ________ English is ________ English magazines.
| A．to learn, read | B．to learn, by reading |
| C．learn, reading | D．learning, read |
____ of the boys in Class 4 are playing games.
| A．All | B．Each | C．The both | D．None |
I don’t know when he______ tomorrow .When he_____ , I’ll let you know.
| A．comes ;comes | B．will come ; comes |
| C．comes ; will come | D．came; will come |