Câu hỏi: Send my regards to Lawrence ............................ you see him.

A. if

B. in case

C. whether

D. provided

Câu 1: If you ................... a pet bird, you’ll have to buy a cage, too.

A. buy

B. will buy

C. bought

D. had bought

Câu 2: The first hamburgers ..................... in Connecticut in 1895.

A. are sold 

B. were sold

C. sold

D. have been sold

Câu 3: What would you do if war .......................... ?

A. break out

B. will break out

C. were to break out

D. breaks out

Câu 4: .............................. if I were you.

A. These wires would look dangerous

B. You should not touch these wires

C. I would not touch these wires

D. These wires were dangerous to you not to me

Câu 5: A new chairman ................. by our staff.

A. chose

B. was chosen 

C. choose 

D. have been chosen

Câu 6: .................................. , the phone will be cut off.

A. If you paid the phone bill today

B. Unless you pay the phone bill today

C. On condition that you had paid the phone bill before

D. In case you have paid the phone bill