In the last decade, Chicago public schools ________ teaching of Chinese to serve 12,000 students.
#101108
A
are expanding
B
have expanded
C
expanded
D
expand
推荐题目
How did you ___ to paint the whole house in a week?
#100831
A
try
B
manage
C
win
D
succeed
 Quantities of precious jewelry_____ buried_____ in the earth. 
#101917
A
was found; deeply
B
were found; deeply
C
was found; deep
D
were found; deep