_________ the room, the man was no longer there.

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

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

 _________ 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

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

_________so much, the doll is still on the shelf.

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

_________you to the job, he felt calm.

A. Appointed B. Appoint C. Having appointed D. To appoint

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

(A) Clerks

(B) Wait for

(C) Customer

(D) Get promoted

Practicing his speaking English everyday, his hope was to get a good job in a foreign company.

(A) His

(B) Everyday

(C) His hope

(D) To get