选择一个正确的答案1.What ______you to do to keep the room clean?A:do,

选择一个正确的答案
1.What ______you to do to keep the room clean?
A:do,have B:did,have C:are,have
2.He _______ from home for a long time.
A:has gone away B:had gone away C:has left D:has been away
3.She Promised she ________do better work.
A:would B:will C:shall D:is going to
4.Our knowledge of the universe _______all the time.
A:grow B:is growing C:grows D:grew