Tom was too shy _______ give a speech in public.
A. in
B. on
C. under
D. to
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Look at the clock! It's time_______work.
A. started
B. to start
C. starting
D. start
The old man has two daughters. _______ are doctors.
A. Both of whom
Both of which
C. Both of them
D. All of them
If you travel in a foreign country, a tour _______ may save you a lot of trouble.
A. guide
B. helper
C. assistant
D. doctor
Dinner will be ready _______. Let’s go and wash our hands.
A. at all
B. just now
C. all around
D. right away