You’ll start having positive results you replace negative thoughts with positive ones .
A．since B．unless C．until D．once
You’d better not phone me tomorrow evening; I ____ an important meeting then.
A. will have B. would have C. will be having D. will have had
_____around the Water Cube, we were then taken to see the Bird’s Nest .
A. Having shown B. To be shown C. Having been shown D. To show
—Go and have great fun! I will cope with _____ you leave to me properly.
—Thanks a lot.
A. why B. when C. what D. which
－France , a cab to school in such thundering weather.
—I will, Mom.
A．gets B．to get C．get D．getting
Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.
A. since B. after C. before D. when
