________is dangerous for us to swim in the river alone.
A. It B. That C. This
Dear students, please read every sentence carefully. The more _____ you are, the______ mistakes you'll make.
A. careful; fewer B. careful; less C. carefully; fewer
______ trees were cut down. And many birds lost their home.
A. Two thousands B. Thousand of C. Thousands of
She likes reading. She usually________ some books from the library.
A. buys B. lends C. borrows
In the past few years there _________great changes in my hometown .
A. have been B. were C. had been
一Look at the girl with a pair of glasses over there．Can you tell me _______?
一She is a nurse．
A．who is she B．who she is C． what she is
