—What the number of the students in your class ? —About 60 . A number of them girls .
— What do you think of the book?— Oh, excellent. It is worth ________ a second time.
He has given me ________ help, so I can make such great progress in Physics.
— How is your English study?— Not bad. But I ________ learning English grammar.
— Are you going anywhere?— I ________ about visiting my cousin, but I have changed my mind.
If you successfully complete a difficult task ________ hard work, you’ll become confident.