Only if you work hard _____, because hard work is the ultimate source of success.
A. you will succeed B. will you succeed
C. you succeed D. do you succeed
The _____ look on his face suggested that the teacher was quite _____ with the result.
A. satisfied; satisfied B. satisfied; satisfying
C. satisfying; satisfied D. satisfying; satisfying
______, I came to realize that my parents could not always stand by me.
A. As time gone by B. With time going by
C. As time going by D. With time gone by
In my opinion, more attention should be ______ the environment, which is of great importance.
A. paid to protecting B. paid to protect
C. paying to protect D. paying to protecting
I owe my success to Mr. Smith, a teacher from America, ______ help I have greatly improved my oral English.
A. by which B. by whose C. with his D. with whose
Many species are in ______ danger of extinction now due to the foolish actions of ______ human race.
A. the; the B. 不填; the
C. the; 不填 D. 不填; 不填
