--- Only one of these books is worth _______.

--- _______ is no wonder that you look so upset.

A．to read; That

B．of reading; This

C．being read; There

D．reading; It

能促进钙吸收的措施包括（）。

A.常在户外晒太阳

B.经常做理疗（热敷）

C.多吃谷类食物

D.多吃蔬菜、水果

E.补充足量的钙