Progress test 3 CAE

Part 1. Multiple choice cloze

1. collocation: transmit + signal
VERB + SIGNAL  (³ series of radio waves, chemical messages, etc.)

• carry, pass The nerves carry these signals to the brain. | 
• convert (sth into), scramble, unscramble The signal is scrambled into code before it is sent. | 
• emit, generate, send, transmit | 
• detect, pick up, receive, respond to This equipment can detect very low frequency signals.
• Source: Oxford collocation dictionary

diffuse

1

1. [INTRANSITIVE/TRANSITIVE] if a gas or liquid diffuses through a substance, or if it is diffused, it spreads through it 

Light gases diffuse through porous surfaces more rapidly than heavy gases.

2

2. [INTRANSITIVE/TRANSITIVE] if light diffuses, or if something diffuses it, it shines over  large area but not very brightly

3. [TRANSITIVE] FORMAL to spread something such as information, ideas, or power among a large group of people