I think the_____invention is a mobile phone. What about you?
A、most helpful
B、more helpful
C、helpfulest
Can you provide us _________ some information _______ the computer?
A、for, with B、with, about C、about, with
He took my English-Chinese dictionary_____mistake.
A、to B、by C、about
Was a car invented_____March 4, 1876?
A、on B、in C、at
Do you know where _________ some maps?
A、can I buy B、can buy C、I can buy
He doesn’t know _________.
A、to do what B、how to do C、what to do