—What was the teacher doing at that time?—He        lessons at school.
#42023
A
gives
B
gave
C
was giving
D
is giving
推荐题目
---What were you doing when the UFO ______? ---I ______ a milk shake.
#41587
A
reached, made
B
reached, was making
C
arrived, made
D
arrived, was making
Clothes made of silk ________ softer than those made of cotton.
#37433
A
are felt
B
feel
C
are feeling
D
is felt
The light rail from Wuhan to Wenquan            in six months.  
#42037
A
will build
B
has built
C
is building
D
will be built
She________ her hometown for many years. No one nearly knows her.
#39646
A
has been away from
B
has left
C
had left
D
left