3. Which has been the standard of care for patients with the most serious blockages?

It has been proved eating vegetables in childhood helps to protect you against serious illnesses in later life.

______has been pointed out before, air pollution is becoming serious in cities. A: That B: What C: Which D: As

The jury will consider whether or not Mr. Wilson has been serious professional misconduct. A: wary…of B: guilty…of C: confronted…with D: reduced..to

如果你当时意识到问题的严重性，并采取措施，结果就完全两样了。 A: Have you realized how serious the problem was then and taken some measures, the result is completely different. B: Have you realized how serious the problem was then and taken some measure, the result will have been completely different. C: Had you realized how serious the problem was then and taken some measures, the result would have been completely different.

What caused such environmental problem? A: The water that used to feed it has been diverted in an ill-irrigation scheme. B: The overfishing problem is too serious there.

Nuclear power plants, ______ to some serious breakdowns, have become a center of controversy. A: having recently been subjected B: recently having been subjected C: have recently subjected D: recently have subjected

My mother has ________ in bed for three days because of her serious heart disease. A: lay B: lied C: been lying D: laid

The panel will consider whether or not Mr. Wilson has been______serious professional misconduct. A: wary of B: guilty of C: confronted with D: reduced to

It’s _____________.I’ll be OK soon . A: serious nothing B: nothing serious C: something serious D: anything serious