---Alice, you look puzzled, Have you understood it?---No．I _____another problem just now．
#101781
A
l have thought of
B
am thinking of
C
had thought of
D
was thinking of
推荐题目
The 29th Olympic Games ____ in Beijing in 2008.
#101695
A
will be held
B
was held
C
has been held
D
is being held
The news he looked forward to .
#100811
A
came at lastest
B
coming at the least
C
coming at the lastest
D
came recently
A lot of people often forget that oral exams ______ to test our communicative ability．
#103014
A
design
B
are designed
C
are designing
D
are being designed
(2013·安徽合肥二模)—The cars give off a great deal of waste gas in the streets.—Yes. But I'm sure something will be done to ________ air pollution.
#99560
A
reduce
B
remove
C
collect
D
warn