托业考试

试题来源：托业-4
【单选题】 The director had her assistant ______the memo.
A．(A) signing
B．(B) signed
C．(C) will sign
D．(D) sign

参考答案：D
网考网解析：
The assistant is the one who signed the memo, so the simple form of the verb is used. Choice (A) is the p... 查看试题解析出处>>