The boy is playing____ piano. He isn’t playing ___ basketball.
A. a, a B. the , / C. /，/
_________ of the population in this area __________ farmers.
A. Two thirds ,are B. Two thirds, is C. Two third, is
----How long _________ she _______ this book ?
----She _________it from the library two weeks ago.
A. has, kept; borrowed B. has, kept; lent C. has, borrowed; borrowed
Nothing can be done _______ he returns.
| A．as | B．before | C．while | D．until |
We must ________ourselves _______our work.
| A．strict in; with | B．be strict with; with | C．be strict with; in | D．strict with; in |
—Could you tell me when________ in Bangkok?
—Sorry, I don’t know. I even want to know what to do when ________.
| A．to arrive, to arrive | B．arriving, to arrive |
| C．to arrive, arriving | D．should we arrive, arriving |