— Sorry I’m late. I got stuck in traffic. — _________. You’re here now. Come in and sit down.
44. —Look!The boy is doing some washing. —He is only eight years old, but he is very ________.
43. Learning a foreign language well takes a long time, ________?
42. Many countries are increasing their use of natural gas, wind and other forms of ________.
41. —Well, it's getting late. I must be going. Thank you again for inviting me to the party. —________
40. —Shall Tom go and play football? —Not ________ he has finished his homework.