شرکت در آزمون آنلاین انگلیسی 3 - درس سوم | آزمون شماره 490

1-

..................................... are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the moon and the sun , and the rotation of the earth.

2-

A recent medical research showed that the knee is the most easily injured of all the .......................... in the body.

3-

We were not able to get a hotel room because we ......................... in advance .

4-

".A: "Mom, I'd like a new bike

B: "I'll have to think about it. You know that ............................................    ."

5-

Because of some limits to our country we can see a gradual and sudden ..................... in the price of different materials .