From the first sign we know we can not_______ in the lake.

A．stay for long

B．fish

C．swim

D．boat

Helen is six years old, and she's got a bad cough. She should take_______ a day.

A．0.5 teaspoonful

B．2 teaspoonfuls

C．1.5 teaspoonfuls

D．3 teaspoonfuls

The fast food shop isn't open_______.
A. at 9:00 P.M. on Saturday            B. at 10:00 A. M. on Friday
C. at 9:00 P.M. on Thursday            D. at 10:00 A. M. on Sunday.