a. the;/ b. /;a c. a; the d. a; /
2. when you walk along the river, you can see the _____ of the trees in the water clearly.
a. mirror b. sight c. shadow d. reflection
3. china is the world’s most populous country with a population of about 1.3 billion, which makes up ______ a quarter of the world population.
a. mainly b. approximately c. punctually d. appropriately
4. the result of this study confirmed the ____ assumption made by the scientist months ago.
a. previous b. precious c. potential d. practical
5. i regularly receive comments from my readers ______ how my words inspire them.
a. owing to b. except for c. as to d. together with
6. what a pity! the great scientist died ______ her experiment half-done.
a. with b. for c. from d. of
7. helen _____ me throughout my stay in london, otherwise i would have been lonely.
a. accompanied b. encouraged c. visited d. missed
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