There______ a number of natural mysteries in the world that even make scientists ______.
| A．exists; confusing | B．are existed; confused |
| C．exist; confused | D．exist; confusing |
Our team _______ five persons.
| A．are made up of | B．is made up of | C．made up of | D．make up of |
He _______ gas a mile from home.
| A．ran out of | B．ran out | C．run out of | D．run out |
I want to go the party, but __________ I ought to stay studying.
| A．on the one hand | B．instead of | C．for one thing | D．on the other hand |
His first book ___________ next months is based on a true story.
| A．published | B．to be published | C．to published | D．being published |
___________ work has been done to improve the people’s living standard.
| A．Many | B．A great many |
| C．A great deal of | D．A large number of |