1 . Learning vocabulary is f________ (基础性的) to mastering a language. （根据中英文提示填空）

2 . There is an ________ (紧急的)need for qualified teachers.（根据汉语提示单词拼写）

3 . Take your ______ (greed) hand off that pie--- you’ve had more than enough already.

4 . After my explanation, Mandy still had a ______ (puzzle) expression on his face.

5 . The world governments are becoming increasingly ______ (concern) about   rising   global   temperature levels.

6 . The team developed ______ (advance) techniques for measuring and controlling the noise of the machine.

7 . A________ in the interesting book, the boy didn’t notice his mother coming in. (根据首字母单词拼写)

8 . Lucy, going through a difficult period right now, finds her friends email really u________ and tries to cheer up. (根据首字母单词拼写)

9 . She got very f________ (害怕) when a plane flew over her head. (根据中英文提示填空）

10 . Wuhu has many good places of interest; whose scenes are very a____.