ANSWERS 1:INTERESTED IN
INTERESTED IN => eager to know about something, curious.
ADJECTIVE + PREPOSITION Examples: She's not interested for politics.X
She's not interested in politics. VINTERESTED + IN
ANSWERS 2:A FEW
A FEW => some, a small number.
QUANTIFIER Examples: Even though the question was difficult, few girls managed to answer it.XFEW means NOT MANY/ALMOST NONE
Even though the question was difficult, a few girls managed to answer it. VA FEW means SOME/A SMALL NUMBER
ANSWERS 3:AS OLD AS
AS + (ADJECTIVE/ADVERB) + AS => used to compare two things, people, amounts, etc.
COMPARISON Examples: Kelly is as tall like her brother. X
Kelly is as tall as her brother. VAS ... AS
ANSWERS 4:THE PRICE OF
HOW MUCH DOES ... COST? => WHAT IS THE PRICE OF ...?
QUESTION Examples: What is the cost of this laptop? It's £500. X What is the price of this laptop? It's £500.V
ANSWERS 5:IF I
DO YOU MIND IF I + PRESENT SIMPLE => used to ask people politely to do things.
POLITE REQUEST Examples: Do you mind if I stay here? VDO YOU MIND IF I + PRESENT SIMPLE => POLITE REQUEST Would you mind if I opened the window? VWOULD YOU MIND IF I + PAST SIMPLE => MORE POLITE REQUEST