Answer:
1. B
Analysis:
约定 (Yuēdìng) agree on; appoint; arrange; convention
Example:
Qǐng búyào wàngjì wǒmen de yuēdìng.
请不要忘记我们的约定。
Please don’t forget our agreement.
预约 (Yùyuē) make an appointment; meet sb. by appointment
Example:
Nǐhǎo, wǒ xiǎng yùyuē yíxià Wáng yīshēng de ménzhěn.
你好，我想预约一下王医生的门诊。
Hello, I’d like to make an appointment with Dr. Wang.
预报 (Yùbào) forecast; forecasting; prediction
Example:
Tiānqìyùbào bìng bù zǒngshì zhǔnquè de.
天气预报并不总是准确的。
The weather forecast is not always accurate.
Dialogue:
Lǐ Jūn: Nǐ hǎo, wǒ zhǎo Chén jīnglǐ.
李军： 你好，我找陈经理。
Li Jun: Hello, may I talk to Manager Chen?
Mìshū: Bùhǎoyìsī, nǐ děi (yùyuē) cái xíng.
秘书： 不好意思，你得(预约)才行。
The secretary: Sorry, you have to (make an appointment) in advance.
From the above, the correct answer is B.