ÌâÄ¿ÄÚÈÝ
ÓÃshould, ought to, have toÌî¿Õ
1£®You ________ come at 4 o¡¯clock if the plane arrives on time£®
2£®I didn¡¯t go shopping this morning as I ________ do the housework£®
3£®She ________ come to see me yesterday, but she forgot£®
4£®You ________ ask for permission before you left the table£®
5£®As they didn¡¯t understand, I ________ explain everything again£®
´ð°¸£ºshould;had to;ought to;should;had to
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿