.---- Mom,I saw some red new mountain bikes in that shop today. ---- Why not buy______?

I want to buy a comic book but there were __________ left at the bookshop.

The top detective asked the witness if he had seen _______ at about 10 p.m.

Of the two speeches, I think the ______ was better.

—What about asking these new graduates to take on the task?—I m afraid not．While they are energetic and ambitious, _____ of them seems to be suitable for this demanding job．