From his ______ expression, we can tell that he was not aware of the topic we were discussing.
A.amazed B.puzzled C.amazing D.puzzling
James has just arrived, but I didn’t know he _______ until yesterday.
A.will come B.was coming C.had come D.came
He was reported ________ in the supermarket when he was doing shopping yesterday.
A.to treat badly B.treating badly
C.to be treated badly D.to have been treated badly
The train due to _______ at 10 am was delayed for 2 hours because of the storm.
A.arriving B.arrive C.be arriving D.having arrived
—Have you finished the book?
—No，I’ve read up to____ the children discover the secret cave.
A.which B.what C.that D.where
Among the crises that face humans ________ the lack of natural resources.
A.is B.are C.is there D.are there
