-What ---- their football team like? -They were all very big

-What ____ their football team like?-They were all very big and strong
此题 用【was】最好,前后语义、时态都更加通畅.
如果选 【is 】也可以理解,但是句意不同,答和问也不完全对应.此时句意可理解为：
——他们的足球队现在怎样呢?
——他们的队员以前都既高大又强壮.【言下之意：现在如何不大清楚】