Jack wasn’t sayinganything, but the teacher smiled at him____he had done something veryclever.[ ]

If you need some help, please call_____ _____ 887-7880.

Mary, along with her parents ________ Hainan for aweek and they will come back soon.

I ______ it everywhere, but I didn’t ______ it.

One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.