This is _____ best kind of _____ pen you can get here.
A.the, the | B.the, a |
C.the, 不填 | D.a, the |
Children’s brains can’t develop properly_______ they lack protein
A.when | B.since | C.because | D.unless |
This is the very toy car ________ which he came here the other day.
A.by | B.in | C.for | D.on |
I began to fish before memory began, _______ I know I have always fished.
A.so far | B.so as far as | C.as far as | D.so |
______ I had done it I knew I had made a mistake.
A.Hardly | B.Directly | C.Mostly | D.Nearly |
Elbert Einstein, for ______ life had once been very hard, was successful later in science .
A.whom | B.whose | C.which | D.his |