—Look at the picture on the wall. It ________be David’s.—Yes, his name is on the first page.
—What else would you like? —________else.I’ve had enough.Thank you.
—Have you finished your homework? —________.Just half of it.How about you?
The first student________to school is Li Lin.
Qomolangma is very dangerous________.
The main reason is________endangered animals.