As it turned out to be a problem of no importance, we()so much time look- ing into it.

单项选择题My brother and I really have no idea as to () about this sudden change of the situation.

A.what to do
B.to do what
C.how to do
D.how can I do

单项选择题When a pencil is partly in a glass of water, it looks as if it ().

A.breaks
B.has broken
C.were broken
D.had been broken