The new treatments ______by Norman Bethune helped a number of soldiers.
A. invent B. invents C, inventing D. invented
---He’s never been to an aquarium.
---_______.
| A．Neither have I | B．Neither do I | C．I never too | D．I don’t too |
Would you mind ______ those old jeans?
| A．don’t wear | B．not to wear | C．aren’t wearing | D．not wearing |
I have been skating _______ nine o’clock.
He _____ when the UFO arrived.
| A．was sleeping | B．were sleeping | C．has slept | D．is asleep |
The teacher said that they ______ hard-working students.
| A．is | B．are | C．were | D．was |