—______ wrote a letter to Mrs. Wang?
—Wang Bo, I think.
A.Who B.Why C.What D.When
We got up early ______ we could catch the first bus.
A.since B.when C.that D.so that
At last, Mary decided ______ Lily some flowers on her birthday.
A.give B.gives C.giving D.to give
More people think paper books are ______ to buy than e-books.
A.easy B.easier C.easiest D.the easiest
We enjoyed ______ at Tom's birthday party last Saturday.
A.myself B.himself C.ourselves D.themselves
I have got a new watch. Take a look ______ it, Ann.
A.in B.at C.of D.for