See the flags on top of the building? That was _______ we did this morning.
#73048
A
when
B
which
C
where
D
what
推荐题目
________ is often the case with human beings, many animals sleep a lot when young, but sleep much less when they get older.
#67127
A
Which
B
What
C
As
D
That
_____by a greater demand for vegetables, farmers have built more green houses.
#68282
A
Driven
B
Being driven
C
to drive
D
Having driven
The kind-hearted couple decided to adopt the boy ____ parents had been killed in an accident.
#74256
A
of whom
B
with whom
C
on whom
D
in whose
The river______ are covered with trees is polluted.
#74034
A
of which the banks
B
whose banks
C
the banks of which
D
A,B,C are right