Write a letter on extension of the payment date for the buyer after reading the following letter.

My sister ______ (write)a letter when somebody dropped in on her.

You are required to write “a letter of (recommend) ______________” in English.

A.write

B.writing

C.wrote

D.to write

______ an answer, he decided to write another letter to them.

A．Receiving

B．Not being received

C．Having not received

D．Not having received

A.with

B.of

C.in

D.by

If you decide to accept an invitation, you () write a letter to show your interest.

A: may

B: can

C: must

D: have to

A.write a letter

B.write to

C.writes to

D.writing to

A．write

B．to write

C．written

D．wrote

A.Tonny to write

B.Tonny write

C.Tonny writing

D.that Tonny write