Let’s go sightseeing next weekend, Ben—That __________ nice.

Which do you prefer to use, QQ______E-mail

Manyexperts believe that teachers’ development is _______ the key to bettereducation lies.

Were you at home at 8:00 last night I called you but nobody answered.— Sorry, I a nap at that time.

He made another wonderful discovery, ____ of great importance to science.