11. It is because people are likely to stay indoors ______ the virus can spread easily ______ people often catch colds.
—Did you forget about my birthday?— __________ I've booked a table at Micheal's restaurant for this evening.
All the __________ blood must be tested for HIV and other infections, which is important for the patients. 【选项
They are considering __________ the house before the prices go up.
She has a gift for creating an atmosphere for her students __________ allows them to communicate freely with each other.
—You can have a pet dog, but suppose you get bored with it in a few days? __________ ?—We won't, we promise!