单项选择。
—Let's go to the Beihai Park if it ________ tomorrow.
—But nobody knows if it ________ tomorrow.
A．won't rain; rains B．doesn't rain; rains
C．doesn't rain; will rain D．won't rain; will rain
单项选择。
—Let's go to the Beihai Park if it ________ tomorrow.
—But nobody knows if it ________ tomorrow.
A．won't rain; rains B．doesn't rain; rains
C．doesn't rain; will rain D．won't rain; will rain
C 点拨：第一句中if引导的是条件状语从句，由于其主句是祈使句，所以从句中的时态用一般现在时；第二句中if引导的是宾语从句，if意为“是否”，其从句中的时态为一般将来时。故选C。