Some English scientists are identifying problems ____ technology in the 21st century. If solved, the solutions could change the world.
| A．facing | B．faced | C．being faced | D．having faced |
.
_______ something to eat, they began to look for something to drink.
| A．To find | B．Find | C．Found | D．Having found |
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If you try your best to study, I think it quite _____that you will catch up with other students.
| A．possibly | B．certainly | C．probably | D．likely |
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In _______ summer of 1963 Martin Luther King Jr. gave _______ speech to many black people.
| A．不填; a | B．不填; the | C．the; the | D．the; a |
.
－Don’t be late for the meeting this afternoon!
－_______
| A．No, I won’t. | B．Yes, I won’t . | C．No, I don’t. | D．Yes, I do. |
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Water as well as other resources ______ all over the world every day.
| A．is wasted | B．are wasted | C．waste | D．wastes |