- I’d like to buy a new house in the center of the city for rent at this special moment

问题补充：

--- I’d like to buy a new house in the center of the city for rent at this special moment.

--- Oh. I never doubt it is worth to buy new houses.

A. whether; to continue

B. that; continuing

C. whether; continuing

D. that; to continue

答案：

A. whether; to continue

(答案→)B. that; continuing

C. whether; continuing

D. that; to continue

解析：doubt用于肯定句时用whether引导同位语从句；用于否定句时，用that引导。sth. is worth sth/ doing此句型中只能用doing，某事值得做。本句中never表达否定含义，故选B。