The office manager insists that his staff use all of their vacation time, but he hardly never takes a vacation himself.

(A) Insists

(B) Use

(C) Their

(D) Hardly never

Not one in one hundred children exposed to the disease are likely to develop symptoms of it.

(A) Not one

(B) Are

(C) Symptoms

4.  It

The notion that students are not sufficiently involved in their education is one reason for the recently surge of support for undergraduate research

(A) Notion

(B) Are not

(C) Their education

(D) Recently

The eastern bluebird is considered the most attractive bird native of North America by many bird-watchers.

(A) Bluebird

(B) Considered

(C) Native of

(D) By

It is difficult to write rules that tell exactly when we should apologize , and it is not difficult to learn how to do it 

(A) Difficult

(B) That

(C) When

(D) And

_________ the room, the man was no longer there.

A. Entering B. When we entered C. On entering D. Having entered

The clerks who are happy to wait for their customer will get promoted soon.

(A) Clerks

(B) Wait for

(C) Customer

(D) Get promoted

_________ anxious to please us, they told us all we wanted to know.

A. Be B. To be C. Being D. In being

_________at by everyone, he was disappointed.

A. Laughed B. Laugh C. Laughing D. In laugh

_________so much, the doll is still on the shelf.

A. Cost B. Costs C. To cost D. Costing