There are so many kinds of computers in the shop. I really don't know ______ to choose. A. what B. which C. where
My friend John lives on ______ floor so he takes the elevator(电梯)home every day.
I want to know ______ she will look like when she grows up.
He couldn’t even afford a cup of tea because he had ______ money left.
We went to Quanjude to eat Beijing Duck ______ we arrived in Beijing.
Don’t you know it’s ______ useful book for English learners?