(文末附答案)2023年高中英语复习一般现在时时态易错题集锦
单选题(经典例题高频考点-名师出品必属精品)
1、What good news! Such a successful gene ______ in pigs that it enables the pigs to produce human serum albumin, a protein made by the liver. Look! Here ________.
A．have they modified; they come
B．did they modify; come they
C．they have modified; are coming they
D．they modify; they are coming
2、"Life is like walking in the snow," Granny used to say,
"because every step ________.”
A．has shown
B．is showing
C．showed
D．shows
3、We will stay at home ...