Sara went to Africa as a volunteer in order to make a ________ to the life of the children there．

A．sense

B．difference

C．promise

D．point

The police wanted to get clear of the reason for the accident, but all the people on the spot remained ________．

A．quiet

B．calm

C．secret

D．silent

________ by the belief that a key university is beneficial to one's future, many parents urge their children to work hard．

A．Guide

B．Guiding

C．Guided

D．Having guided

________ the students came into the classroom, they began to study attentively．

A．Hardly

B．The moment

C．Unless

D．At the moment

The students in the camp to the USA stayed in New York for three days, ________ they visited many famous universities．

A．and during which

B．which time

C．during which time

D．at that time

________ were impressed by his performance．

A．All the people present that day

B．That day all present people

C．All present people that day

D．All that day present people

The house price nowadays is much higher than ________ ten years ago．

A．that

B．it

C．what

D．one

In order to become healthier, he ________ running every afternoon．

A．set about

B．set out

C．set up

D．set aside

The fireworks on the Spring Festival's Eve are really beautiful ________ the clear black sky．

A．across

B．through

C．against

D．above

I am sure we can help you solve the problem, ________ you tell us all the necessary information．

A．in case

B．now that

C．provided that

D．in order that