The research is so designed that once _______ nothing can be done to change it.
| A．begins | B．having begun | C．beginning | D．begun |
People often find themselves caught in such a _____ as “whether…or not…”.
| A．dilemma | B．endeavor | C．fault | D．survival |
_____ the recent bad weather, the project is several weeks behind schedule.
| A．Apart from | B．Owing to | C．Instead of | D．But for |
—Have you got your exam papers?
—Not yet. I guess they _____ at this moment.
| A．are being graded | B．are grading | C．have graded | D．have been graded |
—What about the package of food?
—You’d better _____ it at the service counter before entering the bookstore.
| A．allocate | B．purchase | C．deposit | D．postpone |
If you lose a customer, regret it _____ excuse it, or you will lose him for ever.
| A．as well as | B．rather than | C．as far as | D．other than |