Question

My grandpa transplants some trees to his garden ________ it is the best time for them every year.

A．where

B．when

C．that

D．until

Answer 1

B

考查状语从句。Where哪里，when当什么的时候，until直到，句意：我爷爷给他的花园移植了一些树，当每年对它们来说是最好的时节。故选B。