---I went to the beach and got plenty of rest.
--- ________ You looked tired last time I saw you.
| A．You’d better not. | B．Why not travel abroad? |
| C．I am glad you did. | D．Sounds like a good idea. |
The international agreement, _______ encourage children not to smoke and help people to kick the habit, was signed on 27 February.
| A．intending to | B．being intended to | C．intended to | D．to intend to |
Oetzi, the 5,000 years old “Iceman”, ______on the alpine border between Italy and Austria in 1991.
| A．was discovering | B．was discovered | C．had been discovered | D．discovered |
________ a child begins school, he enters a world of vicious competition where success and failure are clearly defined and measured.
| A．Before | B．Until | C．Whenever | D．The moment |
Newton is known as a gifted scientist with very human weaknesses who stood at the point in history _______ magic ended and science began.
| A．that | B．when | C．where | D．which |
Researchers claim to have found the first proof _______ getting a regular eight hours a night really does make you appear healthier and more attractive.
| A．as | B．that | C．how | D．which |