16.This railway__________Shanghai and Beijing.
A. joins
B. ties
C. concerns
D. connects
查看答案
17.He was afraid of losing his way and made__________on the trees with a knife.
A. symbols
B. words
C. marks
D. signs
18.He__________to see what I meant, though I explained again and again.
A. wondered
B. was unwilling
C. fell
D. failed
19.Your plan__________quite all right, but is it practicable?
A. hears
B. sounds
C. feels
D. looks like
20.We should__________fully the importance of this new policy.
A. understand
B. know
C. learn
D. research