Like with anything new, you should your_________ physician before taking Colon Health Cleansing or any other vitamin.

—When can I call on you, afternoon or evening?
—________. I’ll be at home all the time.

Either he or I ______to the airport.

—Which foreign language are you better at, English or French?—I am sorry I know _______of English and _______of French.

—Do you learn Russian or French?—I learn _____.

—Do you learn Russian or French?—I learn ______.

：不管外界对大学英语四、六级考试有怎样的非议，每年的四、六级考试还是_________地进行着，不少高校的学位证书仍然与大学英语四、六级考试挂钩着，大学英语四、六级考试成绩依然神气着……当大学英语四、六级考试_________成只为一纸证书考试时，大学英语四、六级考试就已经变得_________了。 填入画横线部分最恰当的一项是（ ）。

不管外界对大学英语四、六级考试有怎样的非议，每年的四、六级考试还是________地进行着，不少高校的学位证书仍然与大学英语四、六级考试挂钩着，大学英语四、六级考试成绩依然神气着……当大学英语四、六级考试________成只为一纸证书考试时，大学英语四、六级考试就已经变得________了。填入划横线部分最恰当的一项是（ ）。

Virginius would feel more or less guilty when he______.

Virginius would feel more or less guilty when he _____.

The ball _____ two or three times before rolling down the slope.