All guests must ______ at the front desk.
A. signing in
B. sign in
C. signed in
D. be signing in
查看答案
______ leave! We haven’t finished yet.
A. Don’t
B. Not
C. No
Didn’t
______ careful! You almost spilled coffee on me.
A. Being
Be
C. Not be
D. Will be
______ this medicine before you go to bed, OK?
A. Taking
B. To take
C. Take
D. Took
______ warmly and you won’t catch a cold.
A. Dress
B. To dress
C. Don’t dress
Dressed