:单项填空（10小题，每小题2分）
1. I __________ my
hand to show that I had a question to ask.
A. held on B held up C held to D held back
2. I
reflected _____ possinel reasons whether I go.
A.for B. with C. on D. of
3. Can you
tell me _________ of time if you are coming?
A. ahead B.instead C.
early D. advanced
4. I couldn’t
help _____ sorry for the poor man.
A. feel B. felt C. to feel D. feeling
5. Are yu ______
your son has difficulty in studying at school?
A.aware of B. aware that C. knowing that D.aware of that
6. Some parents
try to scare their children _______ behaving well.
A. to B. of C. at D. into
