He is only too ready to help others, seldom, _____, refusing them when they turn to him.
A. if not B. if ever C. if any D. if so
It is in their ability to speak ______ humans ______ from animals.
A. which; differ B. that; different C. which; different D. that; differ
Tom, look at your shirt! It requires ________.
A. washing B. washed C. to wash D. being washed
I am concerned ____ it that I can’t concentrate ____ my work because of headache.
A. of; on B. of; of C. about; on D. about; to
_____of danger in the street at night, she had to go home, with a friend_____ her.
A. Warned; accompanied B. Warning; accompanying
C. Having warned; accompanied D. Having been warned; accompanying
—Jack is very clever and he studies hard as well.
—It’s no ______ he always comes out first in the exams.
A. doubt B. need C. wonder D. problem
