Cathy is taking notes of the grammatical rules in class at Sunshine School, where she    English now. 
#104609
A
studies
B
studied
C
is studying
D
was studying
推荐题目
Prices____ all the time and no one knows when they         stable.
#101890
A
are going up; become
B
have been going up; will become
C
have gone up; will become
D
have been gone up; become
Quantities of water ________for cooling in the only one of the factories that ________steel.
#102723
A
has been needed;produces
B
have been needed;produce
C
is needed;produce
D
are needed;produces