浅夏轻唱41. ______ it is to shop on the Internet!
A) What easy B) What an easy C) How easy D) How easily
42. Passengers ______ stay seated during the take-off and landing.
A) can B) may C) should D) must
43. In recent years, natural disasters ______ great damage to many tourist attractions.
A) will cause B) have caused C) had caused D) were causing
44. Twenty children aged between 5 and 10 ______ in a campus shooting last month.
