It was with great joy _______ he worked out the problem that he had long been puzzled about.

E-mail, as well as telephones, ______ an important part in daily communication.

Not until he failed the exam _______he had left hisbooks untouched .

下列各句中，没有语病的一项是

How can I wake up so early — Set the alarm at 5:00 am. ________ youwill make it.