The explorer insisted ________ his advice was of ________.
| A．on, value | B．that, value |
| C．on, valuable | D．that, valuable |
－Where is John?
－He ______ the science lab.
A. has gone to B. has been to C. went to
－How about having a picnic with me?
－I’d love to, ______ I’m afraid I have no time.
A. so B. and C. but
－Dad, may I watch TV?
－No, you can’t. You _______ finish your homework first.
A. must B. can C. may
－Oh, so many people in the park?
－Nobody likes to stay at home ______ Sunday morning.
A. in B. on C. at
－How much is the pair of shoes?
－Twenty dollars ____ enough.
A. is B. are C. am