20.You can’t imagine ______ when they received these nice Christmas presents.

20.You can’t imagine ______ when they received these nice Christmas presents.
20.You can’t imagine ______ when they received these nice Christmas presents.

20.You can’t imagine ______ when they received these nice Christmas presents.
how happy they were
你无法想象到当他们收到这些漂亮的圣诞礼物时是多么的开心.

what had happened

没有选项呀,可能该填what they will be like

你无法想象 当他们收到这些可爱精致的圣诞礼物