Don't forget where the emergency exits are __________ an emergency.
Thank you for sending us ____ fresh vegetables of many kinds. You have done us ____ a great service.
——Your book, Tommy? ——No, Mom, it’s my friend’s. ——Remember to return it to ____ name is on it.
I ____ to go for a walk, but someone called and I couldn’t get away.
I’d like to live somewhere ____ the sun shines all year long.
——The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job? ——____ my students have a try?