Which of the following sentences expresses REQUEST？A．Have you ever been to Canada？B．Can he

Which of the following sentence is an elliptical sentence（省略句)？A．On the top of the tree

In which of the following sentences “deposit” is

Which of the following sentences doesn’t contain

Which of the following sentences is the most courteous?()

Which of the following sentences is correct?()

Which of the following sentences is positive?()