托业考试

【单选题】 The secretary had the messenger ______ the envelope as soon as possible.
A．(A) delivering
B．(B) to deliver
C．(C) deliver
D．(D) delivered

网考网参考答案：C
网考网解析：
Deliver is the correct form of the verb after the causative verb had. Choice (A) is the present participle. Choice (B) is the infinitive. Choice (D) is the past participle. 查看试题解析出处>>