1 . Will it rain this afternoon? I’m not sure. (合并成一个句子)
I’m not sure ________ ________ rain this afternoon.

2 . He asked me          __ Tom would go to the party or not. I said      __      he was invited, he would go.

A．if; if

B．whether; whether

C．if; whether

D．whether; if

3 . 我问他是否愿意和我一起看电影。
I asked him _____________ he would like to see a movie with me.

4 . “Did you meet at the underground station?” asked the detective.（保持句意基本不变）
The detective asked ________ we ________ at the underground station.

5 . — Sir, do you know ________ I can arrive at the airport before 6 o’clock in the evening?
— I’m afraid you will miss the plane.

A．how

B．what

C．that

D．if

6 . —The novel Gulliver’s Travels is very nice. Could you tell me ________?
—Two weeks.

A．how long I can keep it

B．when I should return it

C．if I can keep it for another week

7 . —Have you decided to take the black trousers?
—No. I haven’t tried them on yet, so I don’t know ________ they suit me.

A．that

B．why

C． what

D．if

8 . —The Dragon Boat races are so exciting, but our boat is still behind.
—Don’t worry. I’m sure ________ our team will win!

A．if

B．that

C．whether

D．why

9 . We said to her, “Can you do us a favour, Miss Gao?”（合并为一句）
We asked Miss Gao _____ she _____ do us a favour.

10 . — Would you like to watch Avengers: Endgame in the IMAX theater with me?
— I’d love to, ________ I have watched it twice. The movie is really a treat to eyes.

A．if

B．since

C．because

D．even though