---Sam becomes the top student because he is very clever.
---_______. Without the help of his hardworking teachers, he can’t make it at all.
| A．I don’t think so. | B．I’m afraid so. |
| C．I agree with you. | D．I don’t know. |
Wearing white can help people _______when they feel stressed.
| A．fall down | B．calm down | C．look down | D．come down |
David didn’t give up ______ he had failed in the experiment four times.
| A．if | B．while | C．though | D．since |
一Look! That teacher is explaining something to her students again and again!
一_______teacher she is!
| A．How patient | B．What patient | C．How a patient | D．What a patient |
Lucy liked all the dresses there，but she took the ______one to save as much money as possible for Project Hope.
| A．cheaper | B．more expensive | C．cheapest | D．most expensive |
Mandeep can go to school now. UNICEF has paid for her ______.
| A．education | B．vacation | C．competition | D．invention |