1 . If we go on using energy so wastefully, __________ are that our oil wells will be dried up before new energy sources can be found to replace oil.

A．chances	B．opportunities
C．questions	D．problems

2 . ---I have _______that he will continue to rise to the challenges ahead.
---Absolutely.

A．no doubt

B．no wonder

C．no problem

D．no way

3 . Government should adopt laws that would ban advertising and other types of _____ of tobacco products.

A．delivery

B．spread

C．promotion

D．discount

4 . ——How do you like the scenery here,Mr.Black?
——Wonderful indeed.Beyond all_______,I suppose.

A．explanation

B．introduction

C．instruction

D．description

5 . Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.

A．power

B．limit

C．control

D．mercy

6 . The traffic slowed down because of the heavy snow in Yushu county, presenting a new __________ to the recovery from the earthquake.

A．suffering

B．disaster

C．challenge

D．damage