(1)He telephoned Mary ________ he wanted to see her.

(2)This is ________ I want to say and that is all ________ I want to do.

(3)The coffee we had today was different from ________ we had yesterday.

(4)Madame Curie discovered ________ she called radium.

2£®A.if (If)¡¡¡¡B£®whether (Whether)

(1)I want to know ________ she has gone shopping.

(2)We wondered ________ that man was a spy or not.

(3)It depends on ________ we will be ready in time.

(4)I don't know ________ he will come to the office.

(5)________ he comes, I'll tell him at once.