MANILA (Reuters) - The Philippines posted a $4.8 billion trade deficit in April, narrower than the previous month's three-month high of $5 billion, as imports sustained a double-digit growth, the statistics agency said on Thursday. Imports rose 22.8% from a year earlier, the slowest since March last year, to $10.9 billion, while exports increased 6.0% to $6.1 billion.