I had travelled only two hours one day _____ the winds increased so much that I had to put my tent up ____ the winds became too strong.

A. when; before    B. then; but      C. while; because    D. but; before

课文填空某些空需填两个单词

The kite 1) ________ high in the sky, but nothing happened. I was beginning to think that the experiment would not 2)________. Just then, I saw some of the hairs on the string 3)___________. The string was getting 4)________. I brought my finger close to the key and felt a light but very clear 5)_______________.The experiment proves that 6)____________ and electricity are the same.

I had travelled only two hours one day 7)______ the winds increased so much that I had to put my tent up 8)_______ the winds became too strong. Within a few minutes the winds increased 9)______ a howling storm that 10)__________ to blow me and my tent away, but 11)_______ of that happened.

IV. 课文填空（11分）某些空需填两个单词

The kite 1) ________ high in the sky, but nothing happened. I was beginning to think that the experiment would not 2)________. Just then, I saw some of the hairs on the string 3)___________. The string was getting 4)________. I brought my finger close to the key and felt a light but very clear 5)_______________.The experiment proves that 6)____________ and electricity are the same.

I had travelled only two hours one day 7)______ the winds increased so much that I had to put my tent up 8)_______ the winds became too strong. Within a few minutes the winds increased 9)______ a howling storm that 10)__________ to blow me and my tent away, but 11)_______ of that happened.