19、
(A)bloom
(B)gloom
(C)glee
(D)bleach

We can all manage to spare time for family and friends, _______ we feel inclined to do so.
(A)as long as(B)as soon as(C)as far as(D)as well as

16、(A)undermine(B)infest(C)mitigate(D)highlight

17、(A)prosper(B)salute(C)tumble(D)insulate

18、(A)discarded(B)disagreed(C)undeterred(D)undetermined

20、(A)regain(B)relapse(C)resistance(D)repertoire

How long have scientists been studying embryonic stem cells?
(A)One hundred years. (B)Ten years. (C)More than twenty years. (D)One year.

Based on the above passage, which of the following statements is true?
(A)If President Bush had not withdrawn federal funding in stem-cell study, cures to all stem-cell related diseases could have been found. (B)Geron Corp. found the stem-cell business lucrative and hence invested substantial money in it. (C)Stem cells extracted from embryos have a better chance to cure diseases than from adults. (D)To provide quality treatments, approximately two dozen of stem-cell lines would suffice.

Which of the following patient is likely to receive the first experiment of embryonic stem cells?
(A)The paralyzed. (B)The hearing impaired. (C)Patients with cardio-related conditions. (D)Patients with chronic diseases.

“Presidential stem-cell line” derives from which part of the human body?
(A)Brain cell. (B)Skin cell. (C)In vitro-fertilization embryos. (D)Spine cords.

What was the problem of embryonic stem cells in 2001?
(A)Not enough cells were qualified for use as treatments. (B)Not sufficient funding to support research programs. (C)Not many medical teams were interested. (D)Many religion activists fought against it ferociously.