There seemed little hope that the explorer,（ ）by his guide, would find his way through the jungle.

A.having been deserted B.having deserted C.to have been deserted D.to be deserted

At last she left her house and hurried to the airport only ______ the plane flying away.

Whether they are male or female, adolescents feel like deciding on everything themselves in spite of parents’ instruction, especially when they face problems like sex, mental stress, etc., which make them feel ashamed and embarrassed. Thus they often automatically get into troubles due to their imperfect comprehension and judgment. Some are addicted to cigarettes, only several packets of which will hurt their lings and make them breathless quickly. Other can’t quit drinking alcohol, whose harmful effects includes causing young pregnant women to abort or give birth to abnormal babies. The worst is drug abuse, for the withdrawal is tough once their bodies are accustomed to the drugs. Meanwhile, those who share needles bought from illegal chemists are at great risk of being infected with desperate AIDS. If so, neither injecting nor taking pills can guarantee their survival.However, don’t be disappointed at or have prejudice against our children so easily. After all, being awkward is an appendix of youth. As long as we strengthen communication with them instead of only banning this or banning that, we will surely help them avoid anything unfit.

Mountain climbing, like other sports, requires skill, stamina, teamwork, and the knowledge and experience to handle specialized equipment.

______ yelling at me like this? It’s you who are to blame for this affair.

It is claimed by many that the computer is now close to the very soul of the people it touches. It almost ______ the lives of the people and affects everything they do.