—Can I take a seat here, sir?
—__________. My friend will be back soon.
A.It's hard to say B.Go ahead C.Yes, please D.I'm afraid not
__________good time we have to wear different costumes to ask for treats on Halloween night!
A.How B.What C.What a D.What an
I know it takes a lot of energy to heat water, __________I always wash my face with cold water.
A.or B.but C.for D.so
Amy and Kitty became good friends soon and promised __________to each other often.
A.wrote B.writing C.write D.to write
The engineer that we invited last week has ______knowledge____ experience. We all respect him.
A.neither…nor B.not only…but also C.not…but D.either or
The river is about thirty meters in __________.
A.wide B.long C.width D.length
