—I have not heard from Mark for a long time. I'm quite worried about him.
—OK. I ___________ you know the minute I hear anything.
A.have let B.let C.would let D.will let
Beijing's new international airport ___________ into use in 2019 will serve 72 million passengers annually.
A.being put B.to be put
C.put D.putting
We climbed up to the top of a hill,___________ we got a good view of the whole forest park.
A. which B. where
C. when D. that
___________ by what the teacher had said, Anna came up with a new idea for her new project.
A.Inspired B.Inspiring C.Inspire D.To inspire
The Palace Museum has put on many attractions since it ___________ in 2017.
A.had been rebuilt B.was rebuilt C.had rebuilt D.rebuilt
Someone called me up at midnight, but he had hung up I could answer the phone.
A. as B. since
C. until D. before
