II.单项选择(共30小题;每小题1分,满分30分)---When can I come for the photos? I need them tomorrow afternoon? ---They ________ be ready by 12:00.
Professor Smith, along with his assistants, _____ on the project day and night to meet the deadline.
With a lot of difficult problems ______, the newly-elected president is having a hard time.
Hong Kong is famous ______ a shopping heaven where you can buy things of high quality and with a reasonable price.
Eating too much fat can______ heart disease and cause high blood pressure.
Teenagers are damaging their health because they often ______ themselves to so many electric products.