(18) Take an umbrella with you in ( 1. matter 2. case ) it begins to rain. 3. order (20) Computers have played ( 1. so an important part 3. so important part 4. time (19) When Tom heard about his promotion, he was ( 1. so happy that 2. too happy that 3. very elated ) he took everyone out for a drink. 4. too happy ) in our daily lives that we could not live without them. 2. such an important part 4. such important part