---You’ve made great progress in your studies of English, haven’t you?
--- Yes, but much________.
| A．remains to do | B．is remained to do |
| C．is remained to be done | D．remains to be done |
You have to believe in yourself. Self-confidence is _____ to success.
| A．essential | B．combined | C．similar | D．compared |
We can’t go to the concert. _____, it’s too cold. Besides, we’ve no tickets.
| A．After all | B．In other words |
| C．As a result | D．To start with |
The dresses in this company are available in a great _____ of sizes and styles.
| A．combination | B．variety | C．couple | D．amount |
Tommy is _____ only child in the family, so his parents make _____ fuss of him.
| A．an; 不填 | B．不填; the | C．不填; a | D．the; a |
.--- I’m sorry I stepped outside for a smoke. I was very tired..
--- There is no ________ for this while you are on duty.
| A．reason | B．excuse | C．cause | D．explanation |