(2018沈阳)My grandparents wrote letters to keep in touch with others ________ they were young.

A.when B.since C.after D.before

(2018扬州)Hawking is no longer with us, ________ he will continue to inspire the world.

A.so B.if C.but D.as

(2019原创)Everyone should wait in line outside. You couldn't come in u________ your name is called.

(2019原创)T________ he is only seven years old, he knows a lot about science.

(2019原创)I'm sorry. I forgot to take out the rubbish w________ I left home in the morning.

(2019原创)My mom always cooks chicken soup for me b________ it's good for my health.

(2018承德二模)The story mainly tells us that i________ we work hard, we won't fall behind.

(2018保定莲池区二模)We all know that Mike is not an officer, ________ a common soldier.

(2018张家口三模)My clock didn't go off this morning，________ I didn't arrive at school on time.

(2018泰州改编)Give him more time，________ he will find the answer to the question on his own.