—________ when has the country been open to international trade?
—1978，I suppose.
| A．Since | B．In | C．From | D．After |
They have held several meetings to _____ next year's production plans.
| A．set down | B．make out | C．work up | D．draw up |
The workmen made so much _____ that Mrs. Walker had to spend three days cleaning up afterwards.
| A．trouble | B．damage | C．mess | D．nuisance |
She put some soil in the box, then sowed the seeds carefully, and covered it with more soil. _______ she kept the box in the shade.
| A．First | B．Finally | C．Generally | D．gradually |
The appearance of Yao Ming and T-Mac has_____ the fans of a sure victory for the Huston Rocket in the coming NBA contest.
| A．accused | B．expected | C．convinced | D．persuaded |
When she heard from the hospital that her father had died, she _____ into tears.
| A．burst | B．went | C．exploded | D．fell |